Cayson Acquisition Corp, trading under ticker CAPNU, is a blank-check special purpose acquisition company that filed an amended registration statement on Form F-4/A with the Securities and Exchange Commission on April 16, 2026, under accession number 0001493152-26-016931. The F-4/A filing format, reserved for transactions involving a foreign private issuer as the registrant or surviving entity, signals that Cayson is advancing a proposed business combination with an international component. The amendment indicates the company remains in an active deal-pursuit phase, working through regulatory review ahead of a potential merger close. Sponsor details and sector focus are available in the full filing record. Sign up at SpacDesk for complete data on Cayson Acquisition Corp, including deal timelines, SEC filings, and sponsor profiles.